Taper turning and boring attachment



Oct. 26 1926. 1,604,115

A. E. DRlssNr-:R

TAPER TURNLNG AND BORING ATTACHMENT Oct. 26 1926.

A. E. DRISSNER TAPER TURNLNG AND BORING ATTACHMENT- Filed Deo. l1 1924 5 Sheets-Sheet 2 ff() ruft( n,

Oct. 26 1926. 1,604,115

A. E. DRlssNL-:R

TAPER TURNlNG AND BORING ATTACHMENT Filed Dec. 11, 1924 3 Sheets-Sheet 5 Patented Oct. 26, 1926.

UNITED STATES PATENT OFFICE ALIIBED E. I) 0l' CLEVELAND, OHIO, ASSIGH'OB TO TH] .'-NATIONLL Lm GOIPANY, 0F GLEVELAND, OHIO, A CORPORATION 0l' OHIO.

lmmm. '.rUmmre nin nome 'arfiacmmim Application iJed December 11, 1884. Serial In. 765,147.

This invention relates to tool slide mechanism ada ted for use in various types of metal wor ing machines, such as multiple and single spindle automatic screw machines, turret lathes, hand screw machinesi etc., and particularly to a taper turning an boring attachment adapted to'be carried by an indexible'turret, an object of the invention being to provide mechanism for shifting the tools or tool slides carried by the indexible turret at different relative speeds, or frgincreasing the throw or travel of a tool slide,j relatively to the other slides carried by theturret. For instance, in the present invention, aV cam operated member adapted to travel or reciprocate at a predetermined rate of speedis adapted to shift the various tool slides carried at the faces of the turret, and mechanism controlled by said member is provided for causing one or more ofthe tools or' tool slides to travel at a greater speed than the speed of travel of such cam operated member. Normally, each tool slide will be shifted on the turret at the same speed and with the saine throw as the cam operated member, but by'virtue of this invention an increased speed and a eater throw may be imparted to any one oft etool slides. Such a construction and operation is especially advantageous in the case of taper boring or turning tools.

A further object of this invention is to provide an improved mechanism wherein thetool holder and its tool can be shifted for the purpose of cutting the work at various angles, so .that as shown in the present case an inside or an outside taper at any desired angle may be cut in the work merely by adjusting the path of movement of the tool holder, and without interfering with the operating mechanism therefor. In addition, where as in the present instance, a cam operated slide member is shiftable at a definite speed and with a definite range of movement for shifting the tool holder, the invention contemplates the provision of means effective to cause an increased speed or range of movement to be imparted to the tool holder by the operation of such slidel member.

A further object of this .invention is to provide improved mechanism adapted to be carried by the indexible turret of a metal of description andy not of limitation.

working machine and effective to permit one i of the tool holders carried by the turret to be shifted at a greater speed and with a greater throw than the other tool holders carried-by the turret.

Other objects of this invention will appear in the following description and a pended claims thereof, reference being ha to the accompanying .drawings forming a part of this specification wherein like reference characters indicate correspondin parts in the several views and wherein ig. l is a fragmentary sectional view of a part of a machine illustrating my invention as applied thereto; lfig. 2is a plan view illustrating my invention as utilized for outside turnin Fig. 3 is a plan viewvillustrating the mec anism as adapted for taper boring; and Fig. 4 is a sectional elevation taken through the turret and illustrating an embodiment of the invention.

Before explaining in detail the present improvement and mode of operation thereof, 1t 1s desired to have it understood that the inventionV is'not limited to the details of construction and arrangement of parts which are illustrated in the accompanyin drawings, since the invention is capable o other -embodiments, and that the phraseology which is employed is for the The present invention is adapted to be used in connection with various types of metal working machines, and in the present instance by way of example the mechanism is shown as applied to va Gridley single spindle automatic screw machine manufactured by the National Acme' Company. In general the construction comprises a pair of supportin members adapted for instance to be mounte on the tool carrier or turret of the machine. One of the supporting members is provided with a slideway for receiving a tool carrying slide, and is angularlvadjustable relatively to the other supporting' member so that the tool slide may be shifted in different angularly related paths relatively to the work. The tool slide is adjustable about a pivot gear or pinion having a lower set of teeth meshing with a rack shifted by a cam o erated slide member which is reciprocate at a definite speed. The pivot gear also has an upper set of teeth, which set has a greater Purplse number of teeth than the lower set and this upper set of teeth mesh with a rack secured to the tool slide in all angular positions of the tool slide. Thus the construction is such that the tool slide may be shifted in different directions or paths relatively to the work bythe same operating means and bwith a greater speed and throw than that of the operating means, or cam operated slide mem- In the drawings wherein a presentrpreferred embodiment of my invention 1s 1llustrated it will be seen that the mechanism comprises a base or supportlng plate 9 constructed so as to extend into a recessed face 11 of the turret l() and bolted at 12 to the turret. The under face of the base plate 9 is machined lengthwise thereof to receive a gear rack 13 which slides freely therein,

the rack 13 having teeth 13a formed at one side thereof. The rack 13 is tapped so as to receive a downwardly extending stud 14.

A hole of suitable diameter is drilled in the base plate 9 within which extends a bushing l5 which is held from turningby means of a pin 16. Within the bushing 1.5 1s located a pivot gear or pinion 17, the central annular portion of the gear having a bearing against the inner face of the bushing 1,5.

The pivot gear is provlded wlth two sets of teeth at opposite sides of the central bearing portion of he gear. The lower set of teeth 18 mesh with the teeth 13L on the lower rack .13. An adjusting plate is mounted upon the base plate 9 and 1s drilled to receive the bushing 15 and gear 17, the latter projecting above the top of the base plate 9. The upper set of teeth 19 of the pivot gear 17 mesh with the teeth 22 on an upper rack 21, the bushing 15 being cut away so as to permit the rack 2.1 to engage the upper set of teeth. The diameter of the lower set of teeth 18 is less than the diameter of the upper set of teeth. and the loWer set 18 is provided with a less number of teeth than the upper set 19. t

In the present instance, thediflerence 1n diameter. of the lower and upper sets of teeth is represented by the depth of the oliset or shoulder 15a formed in the bushing 15, see Fig. 4. By utilizing ditferent pivot gears 17, the number of teeth in the lower set 18 may be varied with relation to the number of teeth in the upper set so that in operation as hereinafter described, the speed of travel and range of movement of the upper rack 21 and the tool holder may be varied with relation to the lower racl: 13. The adjusting plate 20 is machined to receive the rack 21 which slides freely therein.

A plurality of slots 23 are machined in the adjusting plate 20 at suitable points and through each of these slots extends a screw 24 which extends into suitable tapped holes 4, a boring tool 34 25 in the base plate 9. A series of .holes 25 spaced apart at suitable distances are' provided for each of vthe screws 24 so that 1n adjusting the upper plate 20 on the base plate 9, each screw 24 may be secured in any one of the series of holes 25 provided therefor, and when the several screws are screwed down tightly the plates 20 and 9 will be rsecurely held together in adjusted position.

A dovetail sl1de-way 26 1s machined on the top surface of the adjusting plate 20 and is adapted to receive a dovetail slide 27, an adjusting gib 28 being interposed between the slide and slide-way and secured in position by means of a bolt 29. 'lhe upper gear rack 21 is bolted at 30 to the under face of the tool 'slide 27.

Mounted upon the slide 27 is a tool l1oldy er 31. In the present instance the tool holder and slide are cast integrally for the purpose of providing a strong and durable construction adapted for particular classes of Work. It will be understood ofcourse that the tool holder which clamps the tool 1n position may be separate from the slide and suitably secured thereto. The tool holder 31 is suitably drilled and bored to receive the shank 32 of the tool which is clamped thereto by means of bolts 33. In the construction illustrated in Figs. 1, 3 and provided with a cutting member 35 is illustrated, and in Fig. 2 a turning tool 47 provided with a cuttin' member 48 is illustrated in position in the tool holder proper 31.

The tool turret 10 is provided with oppositely extending axial extensions 36 and 37, extension 36 having a suitable bearing in a bracket 38 of the machine frame, and extension 37 having suitable bearings at 39 and 39a in the machine frame. A drawbar 40 passes through the turret 10 and its. rearward extension 37, and extends over the lead cam drum 43 of the machine. This cam drum is mounted upon the camshaft (not shown) of the machine and is provided with suitable cams (not shown) which cngage at predetermined times `a roller 42 mounted upon a stud 42a secured to the rear 'end of the draw-bar 40. Adjacent to the front end of the draw bar 40 and within the housing of the turret is mounted an actuating member 41 which is fixed to the draw-bar by suitable pins. The actuator 1s machined on its outer periphery so as to receive the stud 14- of the lower gear rack 13. In the present instance the turret l0 is constructed at the four faces thereof for receiving suitable tool slide mechanism and the turret is rotatable within its bearings on the machine frame so as to permit the same to be indexed at proper times by the indexing mechanism of the machine.

The indexing and locking mechanism for the turret may be of any suitable construction and in part is generally illustrated at A in Fig. 1. A detalled description of this mechanism and a urtherdetailed descripmy copending application for automatic smgle spindle or turret lathes, Serial No.

520,287, filed December 6, 1921, now Patent No 1,567,790, dated December. 29, 1925.

In the present construction a single tool slide is shown mounted on the indexible turret 10. The turret herein is\provided with four recessed faces 11 by means of which tool slides of any desired nature mayV also be attached and mounted on the turret.

Each of these tool slides may be provided with studs 14, so that after eachy indexin of the turret a stud'of one of the tool slides or of the rack 13 will move intoposition to be engaged by the Banged actuator 41, whereupon the cam drum 43 at the proper time will operate the draw bar 40 to shift the tool carrierv toward and from the work.

Normally the tool slide travels' at the same speed as the speed of reciprocation of draw bar 40 and .has the same throw or lrange of movement, -By means of the rack and gear construction hereinbefore described, the travel or the tool slide 27 will be accelerated so that the .throw thereof or range of movement will be multiplied with relation to the draw bar 40 and the other tools carried by the turret. The operation of the Vpresent invention will be readily understood. The rotation of the cam drum 43 b the camshaft of the` machine will cause the cams carried by the drum to reciprocate thedraw bar 40 after each indexing of the turret 1 0. When the stud `14 and the lower gear rack 13 are shifted toward the Work 44, which is carried in the revolving spindle 45 of the machine, the teeth 13a of the lower gear rack meshing with the lower set of teeth 18 of the pivot gear will rotate the gear. The upper set of teeth 19- being in mesh with the teeth 22 of gear rack 21 will shift the latter toward the work spindle and thereby the slide 27, tool holder and tool therewith, and causing the tool to operate on thel work. rlhe upper part of the pivot gear 17 having more teeth than the lower part will accelerate the movement of the gear Vrack 21 and will impartto the same a greater throw than that of the draw bar 40, and a greater' throw than the normal throw of the turret.

The direction or path of movement of up per rack 21 will be determined by the angular adjustment of adjusting plate 20, the teeth of the upper rack always being in mesh with the pivot gear 17 irrespective of the angular adjustment of the rack and slide.

tool slides carried by the It will be readily seen that the adjusting ing used initially for approximate adjustthe modes of itsuse, I claim:

plate'20 can be'turned or rotated about the pivot gear 17 at any angle up to 90 merely y loosenin the screws 34 and turning the adjusting ate 2O together vwith bushing 15 about the caring thereof on the pivot gear 17. The elongated holes or slots 23 in plate 2() are provided for the purpose of obtaining short or minute angular adjustments,

the spaced holes 25 in the lower plate 9 hement. Thus when the operator sets up the mechanism for the purpose of cutting a taper in the work at a predetermined angle he removes the screws 24 and turns-the adjusting plateJ 20. until he obtains the approximate cutting angle desired, then inserting the screws 241in the slots so as to exg tend into the nearest holes 25. A Thereupon `1n order to obtain the exact adjustment the adjusting plate 20 is movedto the correct yangle vand the screws securely tightened in position.

Where it is desired to cut an outside taper on t-heA work, tool members-47 and 48 are placed in the tool holder as illustrated in Fig. 2, and where taperboring is to be done tool members 34 andv 35 are placed in the tool holder 31 as illustrated inFigs. l, 3 and 4. In either form the tool may be utilized either for straight cutting or for taper cutting depending upon the adjustmentv of the slide members. 20and 27 with respect to the base plate 9. y

It is to be understood that by describing in detail herein any particular form, strucy p ture or arrangement, it is not intended to limit the invention beyond-the terms of the several claims or the requirements ofthe prior art. j

Having thus explained the nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of 1. In a metal working machine,.the combination ofV an axiallysupported indexible supporting means, means for indexing it, a tool holder slidably. carried thereby, a sliding member shiftablerelatively to said supporting means, means operated by said sliding member for shifting the tool holder relatively to the work at a different speed than said sliding member, and axially located means for pulling said sliding member and thereby the tool holder toward the work.

2. In a metal working-machine, the combination of an axially supported indexible non-sliding supporting means, means for indexing it, an angularly adjustable tool holder slidably carried thereby, means for adjusting the tool holder angularly .relatively to said supporting means, a sliding meml ber shiftable relatively to said supporting means, means operated by said sliding member for shifting the"tool holder relatively to the work at a different speed than said sliding member, and axially located means for pulling said sliding member and thereb the tool holder toward the work.

3.' In ametal working machine, the combination of an axially supported indexible supporting means, means for indexing 1t, a tool holder slidably carried thereby, a reciprocating operating member located axially of` and shiftable relatively to-said supporting means, means for reciprocating shifting the toolv holder relatively to the work and for imparting a greater speed to .the tool holder than that of said reciprocating member.

5. In a metal Working machine, the combination of an axially supported indexible supporting means, means for indexing it,

Van angularly adjustable tool holder slidably carried thereby, means for adjusting said tool holder angularly relatively to said supporting means, a -reciprocating operating member located axially of and shiftable relatively to said supporting means, mechanism operated bysaid reciprocating member for shifting the toolpholder relatively to the Work and for impartingl a greater speed tothe tool holder than that of said reciprocating member, and cam means for operating said reciprocating member thereby to pull the tool holder toward the Work..

6. In a metal Working machine, the combination of an indexible turret having means for attaching tool slides at a. plurality of faces thereof, a tool slide carried at one face of the turret, an operatmg'member shiftablev relatively to the turret, mechanism operated thereby for shifting said tool slide relatively to the work at a greater speed than said operating member, land means for shifting said member.

7. In a metal Working machine, the comf bination ofan indexible turret having means for attaching tool slides at aplurality of faces thereof, a tool slide carried at oneface of the turret, a reciprocating operating member Ashiftable relatively to the turret, gear and rack mechanism operated thereby for shifting said tool slide relatively to the work I at a greater speed than said operating memer, and cam means for shifting sai 8. In a metal Working machine, the combination of an indexlble turret.` having means for attaching tool slides at a plurality of faces thereof, a tool slide carried at one face of the turret, an operating member shiftable relatively to the turret, mechanism operated thereby for shifting said tool slide relatively to the Work at agreater speed than said operating member, means 'for shifting said member, and'means forangularly varying the path of movement of said tool slide. 9. In a metal working machine, the combination of a workl hold-cr, an indexible tool holder, means for indexing it, means for supporting said holders to permit one to shift toward and from the other, an operating member shiftable relatively to said support-E me'm' 'lng means for pulling the shiftable holder Y bination of a Work holder, an indexible tool holder, means for indexing it, means for sup'- porting said holders to permit one to shift toward and from the other, means for angu- A larly varying the path ofmovement of said shi'ftable holder, an operating member shiftable relativelyy to said supporting means for pulling the shift'able holder toward the other,

said 'operating'member for shifting one of said holders relatively to the other at 'a greater speed than said operating member.

and gear and rack mechanism operated by 11. In a metal working machine,the come bination of an indexible tool support adapted toy carry upon its side faces a plurality of shiftable tools, means for indexing it, a tool slide mounted on one of the faces of said support, a tool holder carried by said slide, reciprocating means adapted to successively shift the tools, and means connecting said reciprocating means with said tool1 slide whereby said tool slide and its holder are 4shifted at a different speedjhan the other of said tools.

l2. In a metalworking machine, the combination of an indexible tool support adapted to carry upon its side faces a plurality of shiftable tools, moans for indexing it, an angularly adjustable tool slide mounted on oneof the faces of said support, a tool holder carried by said slide, reciprocating means adapted to successively shift the'tools, and means connecting said reciprocating means with said tool slide whereby said tool slide and its holder are shifted at a greater speed than the other of said tools and comprising sets of gear teeth of different ratio.

- bination of a non-slidable tool carrying turwhereby a different speed of travel is iin- 1,eo4, i i u a pair of racks and gear means having two having means for carrying. a pluralit-Iv of tool slides, a tool slide, means for angu arly 13. In a metal worlging machine, the comadjusting said tool slide to permit the same bination of an indexible turret adapted to to be shifted in different angularly related carry a plurality of sliding tools, means paths, extending intosaid turret for shifting all of slides saidtools, and means carried by said support and to shift a tool slide carried by the turret, said angularly adjustable slide at a differconnecting said means and slide ent speed than the others. 20. In a metal working machine, the comparted to the slide than to the other tools. bnation of an indexible turret supported for 14. In a metal working'machine, the com-l rotation on a horizontal axis and effective to simultaneously support tools on its several ret, an angularly adjustable tool slide carside faces, an angularly adjustable lslide ried thereby, a rack connected thereto, a\ carried by'one of said faces, a tool holder shiftable rack located below said first rack, `carried by said slide, a reciprocating opergearing meshing with said racks, and means ating member shiftable relatively to said reciprocating relatively to said turrent and turret for successively shifting the tools,

Y shiftable tool holder carried mined speed, and means controlled by `carried by the turret.

greater number of teeth -rack than the other thereby to shift one rack tool holder Slide, and gear means having a at a different speed than the other.

located belowl said shiftable rack for shiftmeans foi1 reciprocating said operating meining said last rack, said gearing having a ber, a shiftable rack operated by said recipmeshing with one rocating member, a rack connected to said diiferent number of teeth meshing with said 15. In a metalworking machine, the comret rack than the second rack thereby to bination of an indexible turret having means Shlf 011e Tack at a different Speed than the for carrying a plurality of tool holders, a O thel t I thereby, a, @am 21. In a metal .working machine, the comoperated member shiftable at a predeterblnflClOIl 0f SI1 lndeXlble turret Said for rotation on a horizontal axis and eifecmember for Shifting the i001 holder at' a, tive to simultaneously support tools on its greater speed than the speed of travel of .Several Side faces, an angularly adjustable Said member; Y slide carried by one of said faces, a tool 16, In a metal WO1-king machine, the com. holder'carried by said slide, a reciprocating bination of an indexible turret having means Opertlng member Shiftable relatively to for carrying a plurality of tool holders, a, Said turret for successively shifting the tools, shiftable tool holder carried thereby, Aa cam means' fo? IeClPIOCamg Sad Operating memoperated member Shift-,able at a, predeterbei', a Shiftable rack Operated by Said recipmined speed, means controlled by said 'memrocating member, a rack connected to said ber for shifting the tool holder at a greater tool holder slide, a piyot gear supported speed than the speed oftravel of said memin position to mesh with said racks, and ber, and means for angularly adjusting the means for adjusting said tool holdei` slide path of movement of said tool' holder. angularly relatively to said turret and about 17. In a metal working machine, the comthe axis o fr` said pivot gear, said pivot gear bination of an indexible turret having means having a dllerent'numbr of teeth meshing for carrying a plurality of tool slides, a Wlth 011e I'ak than Wlth the other I'aok tool slide carried thereby, means for anthereby to shift one rack at a different speed gularly adjusting said slide, a common than the other. O i means for shifting all of said tool slides, 22- In a metal WOIklllg' m3011111@ the 00mand means adapted to be connected t0 said bination of a work holder, aturret, a tool means for shifting said angularly adjust- Support carried by saidsturret, an angularly able slide ata different speed than 'the speed adjustable tool carrying slide carried by supported means operative to 'shift alll of the 'I0Av of travel imparted to the other tool ,slides said support and adjustable into diiferent i positions to permit the same to slide in different paths, reciprocating means for oper- 18.- In ametal working machine, the comating said tool slide and located axially of bination of an indexible turret having means for carrying a plurality of tool slides, a tool the turret, means operated. by said reciproslide carried thereby, means for angularly eating means and comprising a rack shiftadjusting said slide, a' reciprocating drawable relatively to said tool support and in bar extending 'into the turret fon shifting a fixed straight path coinciding. with the all of said tool slides, and means adapted path of movement of said reciprocating to be connected to said bar for imparting means, a rack secured to said tool slide, and to said angularly adjustable slide a greater gear means comprising a different number of throw than that imparted to the other tool teeth meshing with one rack than the other slides carried by the turret. thereby to shift one rack at a different speed 19. In a 4metal working machine, the comthan the other. Y bination of a work holder, a tool support 23. In a metalworking machine, the combination of a non-sliding tool carrying tursaid gearing having a greater number of ret, a tool slide carried thereby, a rack conteeth meshin with one rack 'than the other nected thereto, a shiftable rack located bethereby to shlft one rack at a diferent speed 10 low said first rack, gearing meshing with thanthe other. l l 5 said racks, and means reciprocating rela;l Signed at Cleveland, Ohio, this 8th day tively to said turret and located below said of December, 1924. v shiftable rack for shifting Said last rack, ALFRED E. DRISSNER. 

